When my slaves receive also nasty I bind their breasts in leather and see em squirm. I save my teat clamp of ache for my additional nasty slaves. Whether I discipline em by hand or by machine, tormenting their pointer sisters is my much loved thing to do. I even love to just grip one teat in every hand and twist and tweak these nips as if I were unscrewing a jar.... merely I squeeze real hard at the same time..